On 07/17/2013 01:41 PM, labib obaid wrote: > hi > > I need to use boxplot for two subsets at the same page > Hi labib obaid, Try this: test.df<-data.frame(a=rnorm(80)+4,b=rnorm(80)+4, c=rep(LETTERS[1:4],each=20), d=rep(rep(letters[1:4],each=4),5)) boxplot(test.df$a[test.df$c %in% c("A","B")], test.df$a[test.df$c %in% c("C","D")]) That should get you started. Jim